4*8/2=5*9/x

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Solution for 4*8/2=5*9/x equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

(4*8)/2 = (5*9)/x // - (5*9)/x

(4*8)/2-((5*9)/x) = 0

(4*8)/2-45*x^-1 = 0

-45*x^-1 = -16 // : -45

x^-1 = 16/45

-1 < 0

1/(x^1) = 16/45 // * x^1

1 = 16/45*x^1 // : 16/45

45/16 = x^1

x = 45/16

x = 45/16

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